JP2004079351A - Bulb inserting structure of lighting fixture for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bulb inserting structure assuring simple bulb replacement and capable of locating the bulb accurately relative to a reflector. <P>SOLUTION: The bulb inserting structure of a lighting fixture for a vehicle has a socket fixture 30 in which a spring 42 to press the tail of the bulb 20 toward the front is installed and which is furnished with engaging notches (J-slots) 46 to make holding in such a way that engaging projections 26 and fixing projections 34 are overlapped in a plurality of places mating with the fixing projections 34 on the peripheral wall and a socket 40 in cup shape to be fitted on the socket fixture 30 from behind, wherein the J-slots 46 are furnished with engaging recesses to hold the projections 34 in the respective slots 46 when the socket 40 is to be drawn off from the socket fixture 30. A slit extending in the circumferential direction in continuity to each engaging recess of the J-slot 46 is formed in such a size that the engaging projection 26 and the fixing projection 34 can pass through only singly, to eliminate such a conventional inconvenience that the engaging projection 34 is not engaged with the J-slot 46 but only the fixing projection 34 is engaged. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
According to the present invention, a socket having an engaging notch formed on an outer periphery thereof for holding a fixing protrusion on a socket fixture side and an engaging protrusion on a valve side in an overlapping manner is attached to a socket fixture fixed to a valve insertion hole of a reflector. The present invention relates to a bulb insertion structure for a vehicle lighting device, and more particularly to a bulb having an engagement recess for holding an engagement projection in an engagement notch, and enabling a socket integrated with the bulb to be attached to and detached from a socket fixture. It relates to an insertion structure.
[0002]
[Prior art]
As shown in FIGS. 8 and 9, a bulb insertion structure in a conventional vehicle lamp (Japanese Patent Laid-Open No. 9-219103) includes a cylindrical socket fixture 2 fixed to a bulb insertion hole 1 a of a reflector 1. The rear end of the bulb 4 can be accommodated inside, and is constituted by a cup-shaped socket 6 that is attached to the outer periphery of the socket fixture 2 from behind. The socket fixture 2 and the valve 4 are provided with three corresponding fixing projections 2a and three engaging projections 5a. On the outer periphery of the socket 6, three J-shaped portions are provided at positions corresponding to these projections 2a and 5a. A mold slot (hereinafter referred to as J-slot) 7 is provided, and a spring 8 for urging the valve 4 forward is provided inside a socket 6 that can accommodate the rear end of the valve 4.
[0003]
Then, in order to insert the valve 4 into the valve insertion hole 1a, the valve 4 is inserted into the socket fixture 2 as shown by the arrow A in FIG. Next, as shown by the arrow B in FIG. 9, the socket 6 is put on the socket fixture 2 so that the J-slot 7 is aligned with both the projections 5a and 2a, and is pushed forward against the urging force of the spring 8. When rotated clockwise, the fixing projection 2a and the engagement projection 5a engage with the J-slot 7, the socket 6 is fixed to the socket fixture 2, and the valve 4 is inserted into the valve insertion hole 1a. The state shown in FIG. 8 is obtained.
[0004]
The J-slot 7 is provided with an engagement recess 7a for holding the engagement projection 2a when the socket 6 is pulled out, so that the socket 6 can be attached and detached with the valve 4 integrated.
[0005]
That is, the socket 6 integrated with the valve 4 is put on the socket fixture 2 such that the J-slot 7 coincides with the fixed projection 2a by engaging the engagement projection 5a with the J-slot 7, and the urging force of the spring 8 is applied. 8, the fixing protrusion 2a and the engaging protrusion 5a are engaged with the J-slot 7 and the valve 4 is inserted into the valve 4 insertion hole, as shown in FIG. State.
[0006]
In order to pull out the valve 4 from the valve insertion hole 1a, when the socket 6 is pushed in against the urging force of the spring 8, the engaging projection 5a engages with the engaging concave portion 7a and the J slot 7 Since the projection slide slit 7b) is opened, the socket 6 is rotated to slide the fixed projection 2a along the slit 7b to release the engagement between the fixed projection 2a and the J-slot 7 and to release the valve 4. Can be extracted from the socket fixture 2.
[0007]
[Problems to be solved by the invention]
However, in the conventional structure described above, when the socket 6 integrated with the valve 4 is mounted on the socket fixture 2, the socket 6 may be mounted in an incomplete form.
[0008]
As a result of investigating the cause, as shown in FIG. 10A, the valve 4 and the socket 6, which are intended to be properly mounted and integrated, are arranged such that the engagement protrusion 5a on the valve side is a projection slide slit 7b of the J slot 7. There is a case where it is integrated in a form abutting on. Then, when the socket 6 in which the valve 4 is integrated is mounted on the socket fixture 2 in a state where the engagement protrusion 5a and the J-slot 7 are not properly engaged, FIGS. b) The socket 6 is pressed and rotated as shown by arrows A1 and A2, but as shown in FIG. 10B, the engagement projection 5a and the socket 6 are integrally rotated with respect to the fixed projection 2a ( The engaging protrusion 5a does not slide with respect to the J slot 7, and only the fixing protrusion 2a slides as shown by the imaginary line in FIG. 10 (b) (see FIG. 10 (c)). The engagement between the slot 7 and the engagement protrusion 5a on the valve side and the J-slot 7 is maintained in an incomplete state, so that the valve 4 cannot be accurately positioned with respect to the reflector 1, and the valve 4 Was found to be incompletely inserted.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems of the related art, and an object of the present invention is to provide a bulb insertion structure in a vehicle lamp in which a bulb can be easily replaced and a bulb can be accurately positioned with respect to a reflector.
[0010]
Means and action for solving the problem
In order to achieve the above object, in a bulb insertion structure for a vehicle lamp according to claim 1, a plurality of cylindrical socket fixtures formed on an outer periphery of a rear end portion of a cylindrical socket fixture fixed to a bulb insertion hole of a reflector. A tongue-shaped fixing projection of
A plurality of engagement protrusions formed on the outer periphery of the focus ring provided on the valve so as to correspond to the fixed protrusions;
A spring that presses the rear end of the accommodated valve forward is built in, and an engagement notch that holds the engagement protrusion and the fixed protrusion in a plurality of positions corresponding to the fixed protrusion on the outer peripheral wall thereof is provided. A cup-shaped socket formed and attached to the outer periphery of the socket fixture from the rear,
In the above-described engagement notch, when the socket is pulled out of the socket fixture, in the bulb insertion structure of a vehicle lamp provided with an engagement recess for holding the engagement protrusion in the engagement notch,
The slit extending in the circumferential direction that is continuous with the engagement recess of the engagement notch is formed to have a size that allows the engagement protrusion and the fixing protrusion to pass only by themselves. (Operation) In order to insert the valve into the valve insertion hole, first, the engagement projection of the focus ring is engaged with the engagement notch, thereby integrating the valve with the socket. Then, the socket is placed on the socket fixture from the rear so that the fixing protrusion and the engagement notch are aligned, and the socket is pressed forward against the urging force of the spring. At this time, as shown in FIG. 5 (a), if the engagement protrusion and the engagement notch (the protrusion engagement portion inside) are properly engaged, the engagement protrusion of the focusing ring is engaged. And the fixing projection of the socket fixture is located at a position matching the slit for projection sliding. Therefore, if the socket is rotated in a direction in which the fixing protrusion and the engaging notch are engaged, the engaging notch slides along the fixing protrusion, and the fixing protrusion overlaps with the engaging protrusion and the protrusion in the engaging notch is engaged. The position matches the stop. Here, when the pressing force on the socket is released, the fixing projection and the engagement projection are engaged and held in the engagement notch (projection engagement portion) in an overlapping manner by the urging force of the spring. That is, the valve is inserted into the valve insertion hole.
[0011]
On the other hand, in order to attach and detach the valve from the valve insertion hole, the fixing projection and the engagement projection are held in the engagement notch (projection hooking portion) in an overlapping manner, and the valve is opposed to the urging force of the spring. When the socket is pressed forward, the engagement projection of the focus ring engages with the engagement recess in the engagement notch, and the fixing projection of the socket fixture comes to a position aligned with the slit extending in the circumferential direction. Therefore, if the socket is rotated in a direction in which the fixing protrusion and the engaging notch deviate, the engaging notch holding the engaging protrusion in the engaging recess slides along the fixing protrusion (the fixing protrusion of the socket fixture and the focusing ring). The engaging projections are relatively slid), and the fixing projections are located at positions matching the openings of the engaging notches. Here, when the pressing force on the socket is released, the socket is pushed out of the socket fixture by the repulsive force of the urging force of the spring.
[0012]
Then, when the valve is inserted into the valve insertion hole, as shown in FIG. 6A, if the valve is not properly integrated with the socket, for example, the engagement protrusion may be in the circumferential direction within the engagement notch. In the conventional structure, when the engaging projections are not correctly engaged with the engaging notches (the inner projection retaining portions), as in the case where the engaging projections are present in the slits extending in Incompletely engaged with the projection engaging portion).
[0013]
However, in the first aspect, the slit extending in the circumferential direction in the engagement notch is formed to have a size such that the engagement protrusion and the fixing protrusion can each pass alone, so that, for example, the engagement protrusion is formed in the engagement notch. When the engaging projections are not correctly engaged with the engaging notches (the inner projection retaining portions) as in the case where the fixing projections are present in the slits, the fixing projections cannot be in a position matching the slits ( The fixing protrusion cannot enter the slit of the engagement notch), and the socket cannot be rotated in the direction in which the fixing protrusion engages with the engagement notch. Therefore, in this case, the operator who rotates the socket can recognize that the engagement between the engagement protrusion and the engagement notch is incomplete, and re-engages the engagement protrusion with the engagement notch (in which the protrusion is locked). The socket can be fixed to the socket fixture by performing the operation of mounting the socket again after properly engaging the valve with the socket by properly engaging the socket with the socket. That is, unlike the conventional structure, the socket is not fixed to the socket fixture while the engagement between the engagement protrusion and the engagement notch is incomplete.
[0014]
According to a second aspect of the present invention, in the valve insertion structure for a vehicle lamp according to the first aspect, the depth of the engagement recess is formed to be substantially equal to the thickness of the engagement projection.
(Operation) To insert and remove the valve from the valve insertion hole (attach and detach the socket to and from the socket fixture), press the socket forward against the socket fixture against the urging force of the spring, and focus By engaging the engagement protrusion of the ring with the engagement recess in the engagement notch, the fixing protrusion of the socket fixture and the slit extending in the circumferential direction of the engagement notch become a position in which the circumferentially aligned slit is aligned with the socket. Is configured to be rotatable in the circumferential direction (engagement notch is slid along the fixing protrusion).
[0015]
If the depth of the engagement recess is larger than the thickness of the engagement projection, the fixing projection when the socket is pressed is pushed to a position beyond the slit position extending in the circumferential direction as shown in FIG. In addition, the fixing projection and the slit do not align with each other, and the socket cannot be rotated smoothly. On the other hand, when the depth of the engagement recess is smaller than the thickness of the engagement protrusion, as shown in FIG. 4B, it is necessary to increase the slit width so as not to be blocked by the engagement protrusion (focal ring). Therefore, the front-rear length of the socket increases, and the amount of protrusion of the socket behind the reflector increases.
[0016]
However, in the second aspect, since the depth of the engagement recess is substantially equal to the plate thickness of the engagement projection, when the socket is pressed forward against the urging force of the spring, the engagement projection engaged with the engagement recess is formed. Is substantially flush with the peripheral edge of the slit, the fixing projection and the slit are aligned in the circumferential direction, and the socket can be smoothly rotated (the engagement cutout slides along the fixing projection).
[0017]
According to a third aspect of the present invention, in the valve fitting structure for a vehicle lamp according to the first or second aspect, both the base of the bulb provided with the focusing ring and the socket are made of metal, and the outer periphery of the bulb is provided with fingers. A detachable synthetic resin socket cover formed with a contact projection is attached and integrated.
(Action) The socket with the integrated valve is heated by the heat generated by the valve, but the operator picks up the synthetic resin socket cover with low thermal conductivity that is attached to the valve and integrated, and the socket (valve) It is possible to carry out the installation (insertion) and removal without burns.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described based on examples.
[0019]
1 to 7 show an embodiment in which the present invention is applied to a headlamp for a motorcycle. FIG. 1 is a longitudinal sectional view of the headlamp, and FIG. 2 is an exploded perspective view of the vicinity of a bulb insertion hole of the headlamp. FIG. 3 is an enlarged view showing a detailed shape of a J-slot formed in the socket, FIG. 4 is an explanatory view for explaining the relationship between the depth of the engagement recess and the thickness of the engagement projection, and FIG. FIG. 6 is a perspective view for explaining the movement of the engaging protrusion and the fixing protrusion in the engaging notch (J slot) at the time of insertion / removal. FIG. 6 shows an incomplete engagement between the engaging protrusion and the engaging notch (J slot). FIG. 7 is a perspective view for explaining the action of a slit for sliding a projection in an engagement notch (J-slot) when the socket in which the valve is integrated is mounted on the socket fixture in a state, and FIG. 7 is an enlarged view of the engagement notch (J-slot). It is a front view.
[0020]
In these figures, reference numeral 10 denotes a container-like lamp body having a front opening, and a lamp chamber S is defined by assembling a front lens 12 at a front opening of the lamp body 10. An aluminum reflector 14 fixed to the lamp body 10 by fixing means (not shown) is accommodated in the lamp chamber S, and a metal socket is provided in a bulb insertion hole 15 provided at the rear top of the reflector 14. A bulb 20 as a light source is inserted through a fixture 30 and a metal socket 40.
[0021]
The socket fixture 30 has a cylindrical shape, and is formed with three bent legs 32 on the outer periphery of the front end thereof. These legs 32 are screwed to bosses 16 erected on the periphery of the valve insertion hole 15. And integrated with the reflector 14. On the outer periphery of the rear end of the socket fixture 30, three tongue-shaped fixing projections 34 are formed at predetermined intervals in the circumferential direction.
[0022]
The bulb 20 has a structure in which a metal base 22 is integrated with a base end of a glass bulb 21 containing a filament, and a connection terminal 23 is exposed at a rear end of the bulb 20. A metal focus ring 24 is provided on the outer periphery of the base 22, and three tongue-shaped engagement protrusions 26 corresponding to the fixing protrusions 34 on the socket fixture 30 side are provided on the outer periphery of the focus ring 24. Is formed.
[0023]
The socket 40 that can accommodate the rear end of the valve 20 is formed in a stepped cup shape with an opening at the front, and a compression coil spring 42 is built inside the rear end of the socket 40 and slides in the axial direction. The biasing force of the spring 42 acts on the rear end of the valve 20 via the board 43 that is assembled as possible. Reference numeral 44 denotes a power cord connected to the contact terminal of the board 43 and led out from the rear end opening of the socket 40.
[0024]
Also, on the outer peripheral wall of the socket 40, a J-shaped slot (hereinafter referred to as a J-slot), which is three engagement notches corresponding to the engagement projection 36 on the valve 20 side and the fixed projection 34 on the socket fixture 30 side, is provided. ) 46 are formed, and the socket 40 is attached to the outer periphery of the socket fixture 30 from the rear, so that the engaging projection 34 and the fixing projection 26 can be held in an overlapping manner.
[0025]
That is, as shown in an enlarged manner in FIG. 3, the J-slot 46 has an introduction slit 46 a on the J-slot opening side extending in the axial direction, a projection sliding slit 46 b extending in the circumferential direction corresponding to the J-shaped horizontal bar, and The engagement projection 26 and the fixed projection 34 are formed of a projection retaining portion 46c for preventing the projection from coming off, and an engaging recess 46d for engaging with the engaging projection 26 formed at a position facing the projection retaining portion 46c.
[0026]
The widths of the introduction slit 46a, the engaging portion 46c, and the engaging concave portion 46c are formed so as to match the widths W (see FIG. 3) of the engaging protrusion 26 and the fixing protrusion 34, respectively. h (see FIG. 4A) is formed in such a size that the engaging protrusion 26 and the fixing protrusion 34 can be overlapped and held. The engagement recess 46d is large enough to accommodate the engagement protrusion 26, and its depth H (see FIG. 3) particularly matches the plate thickness T1 of the engagement protrusion 26. When the engagement with the engagement recess 46d, the peripheral edge 46b1 of the projection slide slit 46b on the engagement recess 46d side and the front surface 26a of the engagement projection 26 become flush, and the fixing projection 34 is smoothly inserted into the slide slit 46b. And the socket 40 can be smoothly rotated in the circumferential direction.
[0027]
That is, when the depth H1 of the engagement recess 46d is larger than the plate thickness T1 of the engagement protrusion 26, as shown in FIG. 4A, the fixed protrusion 34 when the socket 40 is pressed exceeds the position of the protrusion slide slit 46b. The socket 40 cannot be smoothly rotated because the fixing projection 34 and the projection sliding slit 46c do not align with each other. On the other hand, when the depth H2 of the engagement recess 46d is smaller than the plate thickness T1 of the engagement protrusion 26, the protrusion slides so as not to be blocked by the engagement protrusion 26 (focal ring 24) as shown in FIG. 4b, it is necessary to increase the width d2 of the slit 46b. Therefore, as shown by the phantom line in FIG. 4B, the front-rear length of the socket 40 is increased, and the amount of protrusion of the socket 40 behind the reflector 14 is increased. Become. For this reason, in the present embodiment, the engagement recess 46d is configured to match the plate thickness T1 of the engagement protrusion 26, and the structure does not cause the above problem.
[0028]
The width d (see FIG. 3) of the projection sliding slit 46b is large enough to allow the engagement projection 34 and the fixed projection 26 to pass only independently (in the embodiment, the thickness of the engagement projection 34 is 0.8 mm). The thickness of the fixing projection 26 is 0.6 mm, the width of the projection sliding slit 46b is 1.2 mm, and the socket is not fully engaged with the engaging projection 34 and the J slot 46. The valve 20 is configured to be correctly inserted into the valve insertion hole 15 via the socket 40 and the socket fixture 30 without a problem that the socket 40 is mounted on the socket fixture 30.
[0029]
That is, in order to insert the bulb 20 into the bulb insertion hole 15, first, the bulb 20 is integrated with the socket 40 by engaging the engagement projection 26 of the focus ring 24 with the J slot 46. Then, the socket 40 is put on the socket fixture 30 from behind so that the fixing protrusion 26 and the J slot 46 are aligned, and the socket 40 is pressed forward against the urging force of the spring 42. At this time, as shown in FIG. 5A, if the engagement protrusion 26 and the J-slot 46 (the protrusion retaining portion 46c in the inside) are properly engaged, as shown in FIG. 5B. Then, the focus ring 24 is pushed to the front end of the socket fixture 30 to engage the engagement projection 26 with the engagement recess 46d in the J slot 46, and the fixing projection 34 of the socket fixture 30 is engaged with the projection sliding slit. 46b. Therefore, if the socket 40 is rotated in the direction in which the fixing protrusion 34 and the J slot 46 engage (the direction of arrow B in FIG. 5B), the J slot 46 (projection sliding slit 46b) moves along the fixing protrusion 26. The sliding (the fixing protrusion 34 slides along the slit 46b), the fixing protrusion 34 overlaps with the engaging protrusion 26, and is aligned with the protrusion retaining portion 46c in the J slot (the virtual line shown in FIG. 5B). Reference). Here, when the pressing force on the socket 40 is released, the fixing projection 34 and the engagement projection 26 are engaged with and held by the projection retaining portion 46c while overlapping with the urging force of the spring 42 (see FIG. 5C). ). That is, the valve 20 is inserted into the valve insertion hole 15.
[0030]
On the other hand, in order to detach the valve 20 from the valve insertion hole 15, as shown in FIG. 5 (c), the fixing projection 34 and the engaging projection 26 overlap and are held in (the projection hooking portion 46c of) the J slot 46. In this state, when the socket 40 is pressed forward against the urging force of the spring 42, as shown in FIG. 5B, the engagement projection 26 engages with the engagement recess 46d, and the fixed projection 34 Is a position where it is aligned with the projection slide slit 46b (see the phantom line in FIG. 5B). Therefore, if the socket 40 is rotated in the direction in which the fixing protrusion 34 and the J slot 46 deviate (the direction of the arrow B 'in FIG. 5B), the J slot 46 holding the engaging protrusion 26 in the engaging concave portion 46d is fixed. The fixed protrusion 34 slides along the protrusion 34 (the fixed protrusion 34 and the engagement protrusion 26 slide relative to each other), and the fixed protrusion 34 is located at a position matching the introduction slit 46 a of the J slot 46. Here, when the pressing force on the socket 40 is released, the socket 40 is pushed out of the socket fixture 30 by the repulsive force of the urging force of the spring 42.
[0031]
When the valve 20 is not properly integrated with the socket 40 when the valve 20 is inserted into the valve insertion hole 15, for example, the engaging projection 26 is inserted into the projection sliding slit 46c in the J slot 46. When the engaging projection 26 is not correctly engaged with the J slot 46 (the projection hooking portion 46c therein) as in the case where it is present (see FIG. 6A), the projection slide in the J slot 46 Since the engagement slit 46b is formed in such a size that the engagement projection 26 and the fixed projection 34 can pass only by themselves, as shown in FIG. 6B and FIG. 46b (the fixed protrusion 34 cannot enter the protrusion slide slit 46b of the J-slot 46), so that the fixing protrusion 34 and the J-slot 46 are engaged in the engagement direction. It can not be rotated bets 40.
[0032]
Therefore, in this case, the operator can recognize that the engagement between the engagement protrusion 26 and the J-slot 46 is incomplete, and re-attach the engagement protrusion 26 to the J-slot 46 (the protrusion retaining portion 46c therein). The socket 40 can be fixed to the socket fixture 40 by performing the operation of attaching the socket 40 again after the valve 20 is correctly integrated with the socket 40 by properly engaging.
[0033]
Thus, in the present embodiment, unlike the conventional structure, the socket 40 is not fixed to the socket fixture 30 while the engagement between the engagement protrusion 26 and the J-slot 46 is incomplete.
[0034]
A detachable synthetic resin socket cover 50 having a plurality of fin-shaped protrusions 52 for finger contact on the outer periphery is integrally attached to the outer periphery of the rear end portion of the socket 40. Since the socket 40 in which the valve 20 is integrated becomes high in temperature due to the heat generated by the valve 20 and may be burned if the socket 40 is directly picked by hand, the socket cover 50 which is integrally attached to the valve socket 40 and does not become high in temperature. The socket 40 (valve) can be attached and detached without worrying about burns.
[0035]
Further, the fin-shaped projections 52 on the outer periphery of the socket cover 50 are provided at positions where three fingers such as a thumb, an index finger, and a middle finger can easily be picked up, so that operations such as attaching and detaching can be smoothly performed by picking the socket cover 50. Therefore, even if the gap between the vehicle body on which the headlamp is assembled and the lamp body 10 is narrow, the bulb replacement operation can be performed smoothly.
[0036]
The socket 40 and the socket cover 50 are elastically integrated by being press-fitted in the axial direction, and can be easily separated by strongly pulling the two 40, 50 in the axial direction.
[0037]
【The invention's effect】
As is apparent from the above description, according to the first aspect of the invention, the socket is attached to the socket fixture with the engagement between the engagement protrusion and the engagement notch being incomplete. Since there is no problem that the valve is inserted, the valve can be correctly inserted into the valve insertion hole via the socket and the socket fixture.
[0038]
According to the second aspect, since the socket in which the valve is integrated can be smoothly rotated with respect to the socket fixture, the mounting and dismounting of the socket, that is, the valve replacement can be smoothly performed.
[0039]
According to the third aspect, since the socket (valve) is mounted (inserted) and removed by holding the socket cover without directly touching the high-temperature socket, the valve replacement operation can be performed safely and smoothly.
[0040]
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a motorcycle headlamp according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view of the vicinity of a bulb insertion hole of the headlamp.
FIG. 3 is an enlarged view showing a detailed shape of a J slot formed in a socket.
FIG. 4 is an explanatory diagram illustrating a relationship between a depth of an engagement recess and a plate thickness of the engagement protrusion.
FIG. 5 is a perspective view for explaining the movement of an engagement projection and a fixed projection in an engagement notch (J slot) when inserting and removing a valve.
FIG. 6 is a projection in the engagement notch (J-slot) when the socket integrated with the valve is mounted on the socket fixture in a state where the engagement between the engagement protrusion and the engagement notch (J-slot) is incomplete. It is explanatory drawing explaining the effect | action of the slit for slides.
FIG. 7 is an enlarged front view of an engagement notch (J slot) for explaining the operation of the projection slide slit.
FIG. 8 is a longitudinal sectional view showing a conventional valve insertion structure.
FIG. 9 is an explanatory diagram illustrating a state in which a valve is inserted into a valve insertion hole in a conventional valve insertion structure.
FIG. 10 is an explanatory view showing a state in which a fixed projection engages with a J-slot in a state where the engagement between the engagement projection and the J-slot is insufficient in the conventional valve insertion structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Lamp body 12 Front lens 14 Reflector 15 Valve insertion hole 20 Valve 22 Base 24 Focusing ring 26 Tongue-shaped engagement projection 30 Socket fixture 34 Fixed projection 40 Socket 42 Compression coil spring 46 J-shaped engagement notch Slot (J slot)
46b Protrusion slide slit 46c extending in the circumferential direction continuously from the engagement recess 46c Projection latching portion 46d Engagement recess 50 Socket cover 52 Finger support projection d Width of projection slide slit H Depth of engagement recess T1 Thickness of engagement projection

Claims (3)

A plurality of tongue-shaped fixing projections formed on the outer periphery of the rear end of the cylindrical socket fixture fixed to the valve insertion hole of the reflector;
A plurality of engagement protrusions formed on the outer periphery of the focus ring provided on the valve so as to correspond to the fixed protrusions;
A spring that presses the rear end of the accommodated valve forward is built in, and an engagement notch that holds the engagement projection and the fixed projection in a plurality of positions corresponding to the fixed projection on the outer peripheral wall thereof is provided. A cup-shaped socket formed and attached to the outer periphery of the socket fixture from the rear,
In the engagement notch, when the socket is pulled out of the socket fixture, in the bulb insertion structure of a vehicle lamp provided with an engagement recess for holding the engagement protrusion in the engagement notch,
A slit extending continuously in the circumferential direction from the engaging notch of the engaging notch is formed in a size such that the engaging protrusion and the fixing protrusion can each pass alone. Wearing structure. The valve insertion structure according to claim 1, wherein the depth of the engagement recess is substantially equal to the thickness of the engagement projection. Both the base of the valve provided with the focus ring and the socket are made of metal, and the socket is integrally attached with a detachable synthetic resin socket cover having a projection for finger contact on the outer periphery. The valve insertion structure for a vehicle lamp according to claim 1 or 2, wherein

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